import java.util.Scanner;

class TreeNode{
    public char val;
    public TreeNode left;
    public TreeNode right;
    public TreeNode(char val){
        this.val=val;
    }
}

// 注意类名必须为 Main, 不要有任何 package xxx 信息

public class Main {
    public static int i=0;

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNextLine()) { // 注意 while 处理多个 case
            String str=in.nextLine();
            TreeNode root=createTree(str);
            inOrder(root);
        }
    }

    public static TreeNode createTree(String str){
        char ch=str.charAt(i);
        TreeNode root=null;
        if(ch!='#'){
            root=new TreeNode(ch);
            i++;
            root.left=createTree(str);
            root.right=createTree(str);
        }else{
            i++;
        }
        return root;
    }

    public static void inOrder(TreeNode root){
        if(root==null){
            return;
        }
        inOrder(root.left);
        System.out.print(root.val+" ");
        inOrder(root.right);
    }
}

